How to choose the diameter of sewer pipes for the house
Even a person absolutely far from all unpleasant technical issues related to the withdrawal of products of his life, sometimes forced to ask such a sacramental question. When the sewage system does not work, it's too late to look for a switchman and remodel the entire system. For people who have decided to build such an engineering network with their own hands, we give a short course of the "young fighter".
- The diameter of the sewer pipes is determined by the maximum discharge flow rate. On the fingers it looks like this. Constantly in the house live three people, for every weekend a cheerful company comes and all the sewers are hammered. The minimum diameter of the sewer pipe should provide all these holidays.
- The choice of sewage pipes material is of paramount importance: imagine in your mind how you unhook a cast-iron pipeline with rigid fixing of joints or elegantly change the area of a deformed plastic pipe.
- Requirements SNiP in the case of installing an autonomous system can be neglected, it is enough to set the correct slopes of a pressureless sewage system with a sufficient working cross-section.
You should use the ready-made tables with recommendatory character, you can determine the diameter of sewer pipes and their slope( for example, for the bath these parameters are 40 mm and 1:30, the sinks are 30-40 and 1: 36).Clarity appeared? No, then just take a polypropylene sewer tube of brown( not gray) color with a diameter of 50 mm and take it to the septic tank, aeration fields or just the nearest gutter. What we do not forget:
- bias : a non-pressure sewerage scheme for wastewater discharge can work at slope angles of at least 2-4 degrees, i.е.meter section of PVC and another plastic pipe with a diameter of 50 need to tilt the by 30 mm;
- simplicity of the design: the fewer bends, tees and other potential stagnant zones you will create in your fan system( with equal external and internal diameters), the more reliable the sewage drains will leave your home;
- reliability of docking stations: plastic sewage pipes even in the best industrial samples( Pragma, Corsis, etc.) have insufficient mechanical rigidity;any movement of the soil may disrupt the integrity of the joints;
- calculation of the corners of the bends of : a problem that can be solved without involving specialists;The smaller the radius of the corner elements of any pipeline system, the more industrious it is( in the sewerage the factor is no less important).
What pipe diameter to choose
A simple overview of the offers on the market makes it possible to fix: a PVC pipe without a pressure pipe, perfectly suited for the conditions of an independent sink system of a country house, is sold at a price of 180 rubles per piece. Marking of all plastic pipe products can be given in a metric( 40, 50, 75) or inch system( 1 ¼, 1 ½, 2 ½).Choose native millimeters, at least you will know what you are buying.
There are only two variants of the production execution of sewer pipes made of PVC( polyvinyl chloride), PP( polypropylene) and PE( polyethylene):
- an outer corrugation providing structural rigidity and an internal chemically neutral insert in a composite version made of the same material;
- is a smooth version of a plastic pipeline, whose operating parameters are determined by its internal diameter.
Obviously, you will need external dimensions for excavation, and the internal diameter of the sewer pipe will be responsible for its efficiency. There are doubts, refer to GOST 22689-89 or SNIP 2.04.01-85.
